Prediction of Indoor Air Quality in High Speed Train

초록

The KTX is one of the commonly used transportation to many passengers, especially for long distance, in Korea. For high speed trains, long and straight tracks are needed for operation, which means that the percentage of the tunnel sections is relatively higher than most existing lines. Since the numbers of ventilation systems of the passenger car are limited, the particulate and carbon dioxide concentration increased rapidly. It is operated by setting the guidelines of the indoor air quality of public transport to ensure the comfort of passengers utilizing the train. The focus of this study is to target the vehicle of Hunan (Seoul-Busan) high-speed rail, and trying to develop a prediction equation of carbon dioxide concentration in the air of the room by using the ratio of the tunnel and measuring the concentration values inside the rooms and the line itself. The device used was an SM-2100 of KOREA DIGITAL Inc. It has a detection range of 0 ~ 5000ppm which can save not only for PM and carbon dioxide concentration but for both temperature and humidity as well. To measure the carbon dioxide concentration, from the train’s cabin, the machine was positioned and measured at six second intervals by fixing the shelves in the middle of the room. Time was recorded for the departure and arrival of the train, and so as the time entering the tunnel.